Chip Seal Best Practices (2005) / Chapter Skim
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Many agencies base their chip seal procedures on local anecdotal experience rather than on engineering principles and have limited knowledge of what other agencies may be doing to achieve success. Design and installation of chip seals involve a significant degree of "art." Also, much engineering information is available in the literature of transportation agencies, organizations, and academia.
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The first is that maintenance chip seals play an important part in the nation's pavement preservation program; therefore, they deserve the same level of technical engineering rigor that is reserved for the hot-mix asphalt pavements whose service life the chip seals extend. There was no trend in state population, urbanization, or climatic region as to whether or not maintenance chip seals were employed by a public highway agency.
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Best practices in pavement selection, design, and material selection are as follows: 1. View chip seals as a preventive maintenance tool to be applied on a regular cycle to reinforce the pavement preservation benefits of the technology (chapter nine)
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6. A drag broom fitted on those rollers doing the initial roller pass corrects minor aggregate spread deficiencies such as corrugation, uneven spread, or missed areas (chapter seven)
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6. An aggressive quality control testing program combined with close inspection generates chip seal success (chapter seven)
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